Tait TB8100 User Manual page 126

Filter
Rx path A
Rx path B
Bypass
Extended bypass
Line level
116 Part F: Configuring Channels
The Filter drop-down lists let you select an audio filter for each enabled receive
path.
Option Description
Flat full band Passes audio evenly across the audio spectrum.
Flat speech Passes only speech frequencies.
band
De-emph Passes audio in the speech range, attenuating higher
speech band frequencies. This option can be used if the base station will
receive pre-emphasised transmissions.
De-emph full Passes all audio, attenuating higher frequencies.This option
band can be used if the base station will receive pre-emphasised
transmissions.
Subaudible Passes only the subaudible band, containing any CTCSS tones
band or DCS codes. This option can be used to separate out the
signalling and put it on the line output that is connected to a
tone panel.
Note: The Path B filter does not appear if the Bypass check box is
selected.
Enables the audio path from the receiver to balanced audio output, using the
filter selected for Path A.
Enables the audio path from the receiver to unbalanced audio output, using the
filter selected for Path B.
Bypasses the receiver filters and limiters. This check box is generally cleared, but
must be selected for TaitNet MPT1327 trunked networks, to minimise the
time delay through the base station. This is important when the base station is
handling FFSK data. See TN-745-AN for details.
When the Bypass check boxes are enabled on both the transmit and the receive
paths, Extended bypass check boxes appear on those paths. For details, see
"Extended bypass" on page
The Line level boxes on the receive path set the audio level at the line output
pins. When the reciter receives a signal that is modulated to 60% of a maximum
transmit deviation that is equivalent to the receiver setting, it outputs audio on
the line at the level you set. For channels using the default profile, the receiver
setting is determined by the channel spacing (see
page 138). For channels using custom profiles, it is defined by the Receiver
channel box (see "Receiver channel" on page
Receiver setting
12.5 kHz Narrow Band
20 kHz Mid Band
25 kHz Wide Band
120.
"Channel Spacing" on
109).
Equivalent Max Tx
deviation (Hz)
2500
4000
5000
© Tait Electronics Limited December 2007
60% of Max Tx
deviation (Hz)
1500
2400
3000